| [24776] Notomastus exsertilis | Appellations de Taxon | 24776 |
| [24777] Notomastus latericeus | Appellations de Taxon | 24777 |
| [24778] Nymphonidae | Appellations de Taxon | 24778 |
| [24779] Odostomia | Appellations de Taxon | 24779 |
| [2478] Graptodytes varius | Appellations de Taxon | 2478 |
| [24780] Oerstediidae | Appellations de Taxon | 24780 |
| [24781] Onchidorididae | Appellations de Taxon | 24781 |
| [24782] Onuphis | Appellations de Taxon | 24782 |
| [24783] Ophelia bicornis | Appellations de Taxon | 24783 |
| [24784] Ophelia limacina | Appellations de Taxon | 24784 |
| [24785] Ophelia neglecta | Appellations de Taxon | 24785 |
| [24786] Ophelia radiata | Appellations de Taxon | 24786 |
| [24787] Ophelia rathkei | Appellations de Taxon | 24787 |
| [24788] Ophiodromus | Appellations de Taxon | 24788 |
| [24789] Ophiothrix | Appellations de Taxon | 24789 |
| [2479] Graptodytes sexguttatus | Appellations de Taxon | 2479 |
| [24790] Ophiura | Appellations de Taxon | 24790 |
| [24791] Orbinia (Orbinia) | Appellations de Taxon | 24791 |
| [24792] Orchomene humilis | Appellations de Taxon | 24792 |
| [24793] Osmundea | Appellations de Taxon | 24793 |
| [24794] Owenia fusiformis | Appellations de Taxon | 24794 |
| [24795] Palmariaceae | Appellations de Taxon | 24795 |
| [24796] Pancolinae | Appellations de Taxon | 24796 |
| [24797] Pandora albida | Appellations de Taxon | 24797 |
| [24798] Pandora inaequivalvis | Appellations de Taxon | 24798 |
| [24799] Paradoneis armata | Appellations de Taxon | 24799 |
| [248] Ecnomidae | Appellations de Taxon | 248 |
| [2480] Pachychilon | Appellations de Taxon | 2480 |
| [24800] Paradoneis fulgens | Appellations de Taxon | 24800 |
| [24801] Paradoneis lyra | Appellations de Taxon | 24801 |
| [24802] Paralacydoniidae | Appellations de Taxon | 24802 |
| [24803] Paranemonia cinerea | Appellations de Taxon | 24803 |
| [24804] Paraprionospio pinnata | Appellations de Taxon | 24804 |
| [24805] Pariambus | Appellations de Taxon | 24805 |
| [24806] Pelvetia canaliculata | Appellations de Taxon | 24806 |
| [24807] Periplomatidae | Appellations de Taxon | 24807 |
| [24808] Perrierella audouiniana | Appellations de Taxon | 24808 |
| [24809] Petalonia | Appellations de Taxon | 24809 |
| [2481] Laccornis oblongus | Appellations de Taxon | 2481 |
| [24810] Peyssonneliaceae | Appellations de Taxon | 24810 |
| [24811] Phascolion | Appellations de Taxon | 24811 |
| [24812] Phascolosoma | Appellations de Taxon | 24812 |
| [24813] Pherusa eruca | Appellations de Taxon | 24813 |
| [24814] Pherusa monilifera | Appellations de Taxon | 24814 |
| [24815] Pherusa plumosa | Appellations de Taxon | 24815 |
| [24816] Phyllariopsis | Appellations de Taxon | 24816 |
| [24817] Phyllochaetopterus | Appellations de Taxon | 24817 |
| [24818] Phyllodoce malmgreni | Appellations de Taxon | 24818 |
| [24819] Phyllophora | Appellations de Taxon | 24819 |
| [2482] Scarodytes nigriventris | Appellations de Taxon | 2482 |